煤炭开采板块12月29日涨0.2%，华阳股份领涨，主力资金净流出7268.7万元

Group 1 - The coal mining sector increased by 0.2% compared to the previous trading day, with Huayang Co. leading the gains [1] - The Shanghai Composite Index closed at 3965.28, up 0.04%, while the Shenzhen Component Index closed at 13537.1, down 0.49% [1] - Key stocks in the coal mining sector showed varied performance, with Huayang Co. closing at 8.43, up 3.18%, and other notable stocks like Xinda Zhou A and Jinkong Coal Industry also showing positive gains [1] Group 2 - The coal mining sector experienced a net outflow of 72.687 million yuan from main funds, while retail investors saw a net inflow of 21.4726 million yuan [2] - Major stocks like Shanxi Coal and Electricity and China Shenhua saw significant net inflows from retail investors, while others like Huaihe Energy experienced net outflows [3] - The data indicates a mixed sentiment among investors, with some stocks attracting retail interest while others faced selling pressure from main funds [3]